Bojack, The Wild Taur

Trample
Battle Cry (Whenever this creature attacks, each other attacking creatures get +1/+0 until end of turn.)
When Bojack, The Wild Taur deals combat damage to a player, Bolster 2 (Choose a creature with least toughness among creatures you control and put 2 +1/+1 counters on it.)
"That's a whole lot of cow."-Gorsloth